ST. JOHN'S, N.L. — Prime Minister Stephen Harper has announced the start of a long-awaited upgrade to an aging military complex in St. John's, N.L.

Harper and Premier Danny Williams broke ground at Canadian Forces Station St. John's on Thursday, kicking off the three-year project that will cost $117 million.

The project will consolidate the station's 16 buildings -- all of which are more than 60 years old -- into a multi-purpose facility by 2013.

"CFS St. John's plays a crucial role in supporting our navy personnel as they protect the sovereignty and security of Canada," Harper told about 250 troops at the station's drill hall.

"The consolidation will give local military units the work environment needed to support efficient, streamlined operations."

Williams said the sprawling facility was in desperate need of repair after decades of service dating back to the world wars.

The site in Pleasantville used to house Fort Pepperrell, an American military base that was shut down in 1960.

"These historic facilities were once the pride of this area," he said. "However, after years of use, the properties and buildings are now old and decrepit and badly in need of replacement."

Ottawa announced the funding in 2007, but has just awarded the contract to Bird Construction Inc., a Halifax-based company.

Harper said the project will create 630 jobs and provide a central space for training, vehicle maintenance, classrooms and a military family resource centre.

The site, overlooking Quidi Vidi Lake, supports Maritime Command activities and training for local reserve units.

The units were involved in the recent cleanup in the aftermath of hurricane Igor.

CFS St. John's supports naval vessels that patrol waters off Newfoundland and Labrador